(ii) (5, – 12)
Sol. The terminal
arm passes through P (5, – 12)
∴ x = 5 and y = – 12
r= √(x2+y2
)
∴r=√(52+
(-12)2 )
∴r=√(25+144)
∴r=√169
∴ r = 13
Let the
angle be θ
sin θ = y/r = -12/13
cosec θ = r/y = -13/12
cos θ = x/r = 5/13
sec θ = r/x
= 13/5
tan θ = y/x =-12/5
cot θ = x/y = -5/12